After the government shelved its plans for a mandatory internet filter last year, Optus, Telstra and CyberOne all implemented a voluntary internet filter that blocks access to the Interpol blacklist of the "worst of the worst" of child abuse websites. The government had pledged to continue down the path of mandatory internet filtering once a review of the classification system had been completed.

This review was released earlier this month, with a recommendation that the definition of the content that would be blocked under a mandatory filter should be narrowed to exclude sexual fetish-type material and minor criminal activities such as graffiti or use of proscribed drugs.

At a press conference today, Conroy said that the government was still reviewing the report, but added that it was in discussions with industry associations about getting member internet service providers (ISPs) to implement the filter.

"There are a number of companies already introducing the voluntary filter against the Interpol list. We welcome that, we think it's a very, very positive step. I would hope all companies would introduce that voluntarily," he said. "We're in a situation where we're having some discussions with the industry association and I think we may come to a very positive outcome."